Do old antifouling layers need to be removed before applying F2? Learn when you can keep old coatings and how to optimally prepare the surface.

That depends.<hr>The Recommendation: Complete RemovalWe generally recommend completely removing old antifouling layers. This creates the best foundation for a durable F2 coating and ensures lasting adhesion.<hr>The Alternative: Prepare the SurfaceHowever, if you do not completely remove the old layers, that is also fine as long as the existing surface is smooth and sound. Products where this is possible (as long as the surface is intact) include: VC 17m, VC Offshore, Hempel Mille NCT, Seajet 037 Coastal, and International Ultra 300.<ul><li style="font-size: 16px;">Sanding: Sand the surface evenly with a K120-220 grit until it is smooth and sound.</li><li style="font-size: 16px;">Cleaning: Afterward, thoroughly clean the surface with F2 EcoDegreaser to remove all residues and sanding dust.</li><li id="isPasted">Sealing: Use F2 Primer as a sealant and adhesive base.</li></ul><hr>Important Note: MoistureMoisture in the hull&#x2014;for example, from osmosis, trapped moisture in old primers, or condensation&#x2014;must be completely eliminated before the F2 coating is applied. Trapped moisture can lead to the coating blistering or partially peeling later, as the moisture tries to expand or escape.Important Note: Silicone AntifoulingsF2 is not compatible with silicone antifoulings. Silicone antifoulings must always be completely removed, as F2 does not adhere to these surfaces.

Do old antifouling layers have to be completely removed?

Can F2 be applied to aluminum? Yes, but only with the right primer. Learn why a primer is essential for long-lasting protection.

Yes, F2 is suitable for application on aluminum hulls.The coating contains no metallic components that could interact with the aluminum. Additionally, the F2 coating provides waterproof protection that shields the aluminum and reduces the risk of corrosion.Nevertheless, we recommend applying a special anti-corrosion primer underneath the coating.

Can F2 be applied to aluminum hulls?

Yes, F2 forms a waterproof barrier against osmosis. Learn why a 2K epoxy primer is still recommended for maximum protection and what to consider when choosing one.

Yes, F2 EcoHull provides protection against osmosis.The F2 coating is designed to be watertight. It forms a barrier that effectively prevents water from penetrating the hull. It thus makes an important contribution to protecting against osmosis, which is caused by moisture in the laminate.Recommendation for additional protectionAlthough F2 already provides protection, for maximum security, we always recommend a classic 2-component epoxy primer as a base coat. This primer ensures a completely dense and robust barrier against osmosis.Choosing the primerWhen choosing a 2-component epoxy primer, there is an important point to consider:<ul><li>Ideally, use a solvent-free primer. These primers can be coated directly with F2 Adhesive Coat as soon as they are ready to be overcoated.</li><li>If your primer contains solvents, it must be aired out for several days before you apply F2 Adhesive Coat. To ensure optimal adhesion, you should also lightly sand the surface again after it has aired out.</li></ul>

Does F2 EcoHull also provide protection against osmosis?

Learn how you can apply F2 over an existing 2K primer. We explain the necessary steps to ensure optimal adhesion.

Yes, that is possible. You can easily apply F2 directly over an existing 2-component primer (2K primer). In this case, you do not need the F2 Primer in addition.<hr>Here&apos;s how to prepare the surface:<ul><li>Check the primer type: If it&apos;s a solvent-free primer, you can skip the airing out and re-sanding.</li><li>For solvents: If the primer contains solvents, it must air out for several days after application until the solvents have completely evaporated.</li><li>Re-sand the surface: To optimize adhesion, we recommend lightly sanding the surface again after it has aired out.</li><li>Clean thoroughly: Make sure the surface is dust-free before you start with the F2 coating.</li></ul>

Can I apply F2 over an existing 2K primer?

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F2 Eco

Everything about correctly preparing your boat's hull. Find out how F2 is applied to different materials and over old coatings.

Compatibility & Substrate: How to Prepare Your Hull for F2

Here you will find all the essential information about preparing your boat's hull. We cover how to ensure F2's compatibility with different materials and existing coatings.

Compatibility & Substrate

What is F2 and how does it differ from traditional antifouling?

Antifouling vs. Fouling-Release: What is the difference?

Are there independent tests that prove the effectiveness of F2 Eco?

Do I really get no more fouling with F2?

How long does an F2 coating last?

Is F2 truly eco-friendly?

How does F2 affect speed and fuel consumption?

Does F2 get brittle, flake, or peel off?

How does F2 behave when the boat is on land?

Is F2 a new technology?

Why should I choose F2 over traditional antifouling products?

What colors are available? Can I order a custom color?

Can I also apply F2 to propellers?

How can the F2 coating be removed?

General Product Questions

Does F2 also work in freshwater?

Does F2 fall under the EU Biocidal Products Regulation?

Is F2 approved in the Netherlands?

Is F2 approved in Denmark?

Is F2 approved in Sweden?

Is F2 approved on Lake Constance?

Approvals & Regulations

How do I prepare my boat hull for the F2 coating?

Do I need a primer before applying F2?

How to apply F2 EcoHull (Step by Step)

What rollers and tools should I use for the application?

How long does it take for F2 to fully cure?

Can I apply F2 myself, or do I need a professional?

What is the optimal ambient temperature for applying F2?

Does F2 have to go into the water immediately after coating?

What should be considered when craning with F2?

Application and Processing

How do I care for my hull after application?

What should I do if there is damage to the coating?

Care and Repair